package com.eBook.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;


/*
 * 该过滤器用于设置编码方式
 * */
public class CharsetFilter  implements Filter{
	private String encoding = null;
	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		
		
		encoding = filterConfig.getInitParameter("encoding");
		if(encoding == null){
			encoding = "UTF-8";
		}
	}
	
	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
	
		request.setCharacterEncoding(encoding);
		response.setCharacterEncoding(encoding);
		chain.doFilter(request, response);
		
	}
	@Override
	public void destroy() {
		
	}

}
